"zxcvbob" > wrote in message
...
> Vox Humana wrote:
> > I can see how the contents of the can might
> > not cook evenly if isn't fully covered, but that is the opposite of
having
> > the can explode.
> >
>
> Making sure the can is fully submerged doesn't do anything except give you
> more water in the pot so it takes longer to boil dry while you're not
> watching it.
>
> It's a harmless but needless precaution. Just like sterilizing your jars
> before you fill them when you're gonna pressure-can them anyway.
>
> I think pressure cooking several unopened cans at once for an hour at 15
> pounds makes sense; the extra cans can be stored on the shelf
ready-to-use.
>
> Best regards,
> Bob

That all makes sense to me.